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Post by johnlangdon on Mar 29, 2016 13:34:54 GMT -5
Does anyone have a MK18 inspired build they would like to post pictures of or issues they've had with a MK18 style build? What about parts that worked well in your build? Waiting on the ATF as I write this....hoping for a quick turnaround on that Form 1.  Here's a look at what I'm thinking. The rail may need to be something like 9.25" to make removing and attaching the suppressor easier. www.ar15.com/gunstruction/?guid=BE35C375-2DDF-41E7-A078-35FDCB5F5FF5 |
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Post by panzer0170 on Mar 30, 2016 8:28:12 GMT -5
Question; Accuracy to the original vs just wanting something similar? And is it a toy, or for a practical piece for a given job?  Mostly nosy. |
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Post by waffenmacht on Mar 30, 2016 10:23:02 GMT -5
I've got three... Teammates have a few too. I'll post some pics/data shortly. Two of mine are LMT's that are ran primarily suppressed. The other is a Mod0 build that is Colt. Looking at the link you posted I personally would not go with the lightweight lower/upper combo. I doubt I would run a flat precision type trigger. I would lean towards a Geissele G2S. I would also stay away from the PWS buffer/receiver extension (I have seen several major failures with this design). I've also seen no benefit with the BCM charging handle. I still had to silicone mine to help with the gas blowback.
You are right in the the barrel/flash hider/rail/suppressor must be compatible with each other.
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Post by johnlangdon on Mar 30, 2016 13:17:27 GMT -5
panzer0170 Something similar. I cannot justify close to $450 for a DD rail. It just doesn't make sense to me. The job of this gun will be defensive...just like the others, right? lol. What I mean is that this one in particular will have a suppressor attached almost always for home and vehicle, so the shorter the package the better. Obviously I want to balance size and performance. waffenmacht - I own a CMC flat trigger for my main rifle and love it. The PWS buffer was more for looks than what I'll actually install. The rail is going to be a MI gen3 T series quad rail, Gunstruction just didn't have that model available. And really, that was just to give an idea of what I want to shoot for...pun intended. As far as the charging handle, I'm just familiar with the BCM version. Griffin Armament just cam out with one that has a vent/port hole to redirect the gas on DI guns. It's pretty neat. But I don't know if close to $90 is worth it for a charging handle.
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Post by waffenmacht on Mar 30, 2016 13:42:41 GMT -5
panzer0170 Something similar. I cannot justify close to $450 for a DD rail. It just doesn't make sense to me. The job of this gun will be defensive...just like the others, right? lol. What I mean is that this one in particular will have a suppressor attached almost always for home and vehicle, so the shorter the package the better. Obviously I want to balance size and performance. waffenmacht - I own a CMC flat trigger for my main rifle and love it. The PWS buffer was more for looks than what I'll actually install. The rail is going to be a MI gen3 T series quad rail, Gunstruction just didn't have that model available. And really, that was just to give an idea of what I want to shoot for...pun intended. As far as the charging handle, I'm just familiar with the BCM version. Griffin Armament just cam out with one that has a vent/port hole to redirect the gas on DI guns. It's pretty neat. But I don't know if close to $90 is worth it for a charging handle. Gotcha. Definitely stay away from the PWS receiver extension. Save your $ on the BCM and go stock unless you do find a better CH. Also, going with a more modern rail like the BCM KMR "ALPHA" will save weight and be more efficient since you aren't trying to build a MK18 clone but rather a 10.5" SBR. BCM KMR ALPHA |
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Post by johnlangdon on Mar 30, 2016 15:23:05 GMT -5
Also, going with a more modern rail like the BCM KMR "ALPHA" will save weight and be more efficient since you aren't trying to build a MK18 clone but rather a 10.5" SBR. That joker is light! |
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Post by panzer0170 on Mar 30, 2016 19:28:53 GMT -5
What are everyone and anyone's thoughts on a SBR 7.62x51 AR? How terribly would a short barrel affect the muzzle velocity, range etc? LMT appear to do a 13.5" gun in 7.62 which seems an odd length, and I figure there is a reason it's that, not say 10.5" or another "standard" length...
JL - This is all your fault for leading me astray!
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Post by waffenmacht on Mar 31, 2016 6:14:48 GMT -5
What are everyone and anyone's thoughts on a SBR 7.62x51 AR? How terribly would a short barrel affect the muzzle velocity, range etc? LMT appear to do a 13.5" gun in 7.62 which seems an odd length, and I figure there is a reason it's that, not say 10.5" or another "standard" length... JL - This is all your fault for leading me astray! The Mil issue SCAR 17 (7.62x51) has a factory barrel of 13". I think that is the sweet spot in regards to short barrels in 762 NATO. |
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Post by panzer0170 on Mar 31, 2016 7:28:13 GMT -5
Cheers lad. I figured someone somewhere would know something about it. Seems to be a common theme among vaguely military .308 stuff that is 'compact'. Would love to see a Mk18 inspired .308! Not entirely sure of the practicality of it, but I do quite like the idea.
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Dave R
Junior Member
Posts: 460
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Post by Dave R on Mar 31, 2016 15:04:07 GMT -5
Dont want to derail this thread, but one quick question. Did research and could never find a direct answer. When submitting a form 1, must you be in possession of the firearm you plan on modifying? What method would be used to say order a premade SBR online?
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Post by waffenmacht on Apr 1, 2016 8:52:36 GMT -5
Dont want to derail this thread, but one quick question. Did research and could never find a direct answer. When submitting a form 1, must you be in possession of the firearm you plan on modifying? What method would be used to say order a premade SBR online? Form 1 is for the manufacture of a firearm, for example you have an Ar lower and you want to SBR it, you will fill out Form 1 with the lower info and wait on approval at which time you can install the shorter barrel. Form 3 is for a weapon that was born as an SBR, and you are simply buying it. If it is in the same state as you all you need is a Form 3, but if it is out of state the dealer in possession of the rifle will submit a Form 4 to transfer the weapon to your dealer...then you will submit a Form 3 to transfer it to you. |
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Post by johnlangdon on Apr 1, 2016 9:04:29 GMT -5
Dont want to derail this thread, but one quick question. Did research and could never find a direct answer. When submitting a form 1, must you be in possession of the firearm you plan on modifying? What method would be used to say order a premade SBR online? For the Form 1 you can file online and it's helpful to have the stripped lower in front of you because you'll need the serial number. This is a great video by Capitol Armory on submitting your own Form 1. I followed their video for submitting my Form 1 via eForms. As far as a factory made SBR, usually the engraving is done and it is registered with the ATF as such. Check this out, it may point you in the right direction: www.capitolarmory.com/nfa-c4-billet-stripped-ar15-sbr-lower-receiver.htmlLet's assume you buy an SBR lower online that has already been engraved and does not require any further engraving: I believe you would go about it like a suppressor. The dealer would file a Form 3 to transfer it to another class 3 FFL, once that's approved it can be shipped by the dealer you purchased it from to the dealer of your choice. Once the dealer of your choice has received the lower, they will submit the Form 4 along with your $200 check and trust to the ATF for approval, this is when the wait for the approval on your tax stamp begins. BTW, not affiliated with Capitol Armory, they're just good dudes and they communicate very well with customers. |
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Dave R
Junior Member
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Post by Dave R on Apr 1, 2016 9:06:23 GMT -5
Thanks, fellas.
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Post by waffenmacht on Apr 2, 2016 10:15:45 GMT -5
Over the next week or so I will upload pics of some of my MK18/SBR builds as well as those of fellow teammates. Ill try to include a description of parts and primary uses. Up first is a MK18 Mod0 clone (early). Primary use is a collectible example of an influential mil-issue platform. Colt A2 lower, fiberlite stock, A1 grip, PRI Gasbuster charging handle, Colt chopped carry handle, KAC RAS, KAC rail covers, Forward grip, PSA 10.5 cold hammer forged chrome lined barrel, PSA upper reciever and PSA bolt/carrier group. Upcoming mods will be KAC QD compensator and Optic/mount correct for this era build. If I get a hard-on I might pay the $100 to have the barrel chopped to 10.3.   |
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Post by waffenmacht on Apr 2, 2016 10:30:27 GMT -5
Next is a rifle that actually gets quite a bit of use. Primarily it is a "loaner" gun for new/potential teamates but also sees use on occasion when I want a SBR rather then my primary (SCAR 16 with 16" barrel) This is inspired by the MK18 Mod1. This began its life as an LMT 10.5" SBR. It has an AAC 18T blackout flash hider with matching AAC M4-1000 suppressor (90% of the rounds fired are suppressed). BCM gunfighter charging handle with silicone mod, B5 SOPMOD stock, Tango Down grip, SCAR rear sight, Troy HK style front flip sight, Troy quad rail, front sight was chopped/reprofiled and cerakoted to fit under the rail. Inforce WML weaponlight, Tango Down rail panels, Gear Sector handstop. Vickers Blue Force Gear sling with PB connectors. Optic is an Aimpoint PRO with ADM mount (this might soon get upgraded to a Trijicon MRO). Weapon has been utterly reliable with a standard buffer and easily gets silhouette steel hits at 300 meters.   |
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Mostly nosy.
