Slim
Active Member
So last year I got the idea I needed/wanted a Glock SBR. Figuring on the long lead time for a Form 1, I purchased a G17 and sent off the paperwork. Stated length, like the other centerfire SBRs I filed at the same time was 29", thanks to some of the very informative threads I read here on MDShooters.com.
One question I've had is if it is necessary in MDSP's eyes for a pistol/rifle/SBR to be a visual clone of some other evil weapon that actually exists for it to be a "copycat". There is no Glock rifle. There is the Glock 18, but every G17 looks remarkably like the G18 minus that one little lever on the slide. Also, it never came from the factory with a stock. So do I even need to worry about the 29" rule?
Anyway, paperwork cleared in October and I started collecting parts. I started with the ENDO Tactical stock adapter. All polymer, so not likely to damage the host frame, and surprisingly sturdy. We're it not for the 29" thing, I'd just throw any old M4 receiver extension, lock ring, castle nut, and stock on there and call it a day. That only gets me to maybe 25 inches or so.
I'd originally thought about doing a Glock 34 SBR, but like the MDSP 29" copycat question, I was concerned about the 922r requirement for a pistol made into a rifle. Again, there is no Glock rifle, so that question remains unresolved, but I wanted to avoid any future imperial entanglements and went with a G17 USA. Bought a Glock 34 upper to give me a little more length for my fingers under the barrel when held with a VFG. Adds ~0.55" or so to OAL. Could go another half inch with a threaded barrel, but that leads to other potential problems with MD regs.
So I dug through my parts bin and came up with an M4 carbine reciever extension and a Vltor A1 fixed stock. That stock, if you're familiar, can be installed on an M16 rifle or carbine extension. In the latter case, it locks in place with an adjustable, if not rapidly, locking pin that cams in place into the reciever extension hole of your choice.
So now I'd created a two-and-a-half-foot long Glock. Or rather Maryland made me do it. Easiest remedy seemed to be to fold it in half. Picked up one of the UTG or other offshore folding adapters that attaches a receiver extension to a reciever block, but has no provision for a buffer & spring. (Not needed; my stock is only filled with ridiculousness.). That made the whole thing longer, but now it folds. And I shortened the Vltor A1clubfoot's position on the extension.
29" and change:
Next up is to figure out how I'm going to suppress this monstrosity. I've got an AAC TiRant 45M in jail at Baltimore's Best Pawn. Usually folding stock plus flash hider/suppressor = copycat. Anyone know if that applies if I'm not copying any other weapon, banned or unbanned? If I'm bound by the copycat thing, then I'll remove the folding adapter and move the stock back out a few positions. Also I'd consider an A5 or AR10 extension and one of the longer Magpul stocks with a screwed-on extended buy pad since that would be easier to collapse to a more compact size.
Any thoughts on the best way to get a compliant Glock SBR? Anyone else working on one?
One question I've had is if it is necessary in MDSP's eyes for a pistol/rifle/SBR to be a visual clone of some other evil weapon that actually exists for it to be a "copycat". There is no Glock rifle. There is the Glock 18, but every G17 looks remarkably like the G18 minus that one little lever on the slide. Also, it never came from the factory with a stock. So do I even need to worry about the 29" rule?
Anyway, paperwork cleared in October and I started collecting parts. I started with the ENDO Tactical stock adapter. All polymer, so not likely to damage the host frame, and surprisingly sturdy. We're it not for the 29" thing, I'd just throw any old M4 receiver extension, lock ring, castle nut, and stock on there and call it a day. That only gets me to maybe 25 inches or so.
I'd originally thought about doing a Glock 34 SBR, but like the MDSP 29" copycat question, I was concerned about the 922r requirement for a pistol made into a rifle. Again, there is no Glock rifle, so that question remains unresolved, but I wanted to avoid any future imperial entanglements and went with a G17 USA. Bought a Glock 34 upper to give me a little more length for my fingers under the barrel when held with a VFG. Adds ~0.55" or so to OAL. Could go another half inch with a threaded barrel, but that leads to other potential problems with MD regs.
So I dug through my parts bin and came up with an M4 carbine reciever extension and a Vltor A1 fixed stock. That stock, if you're familiar, can be installed on an M16 rifle or carbine extension. In the latter case, it locks in place with an adjustable, if not rapidly, locking pin that cams in place into the reciever extension hole of your choice.
So now I'd created a two-and-a-half-foot long Glock. Or rather Maryland made me do it. Easiest remedy seemed to be to fold it in half. Picked up one of the UTG or other offshore folding adapters that attaches a receiver extension to a reciever block, but has no provision for a buffer & spring. (Not needed; my stock is only filled with ridiculousness.). That made the whole thing longer, but now it folds. And I shortened the Vltor A1clubfoot's position on the extension.
29" and change:
Next up is to figure out how I'm going to suppress this monstrosity. I've got an AAC TiRant 45M in jail at Baltimore's Best Pawn. Usually folding stock plus flash hider/suppressor = copycat. Anyone know if that applies if I'm not copying any other weapon, banned or unbanned? If I'm bound by the copycat thing, then I'll remove the folding adapter and move the stock back out a few positions. Also I'd consider an A5 or AR10 extension and one of the longer Magpul stocks with a screwed-on extended buy pad since that would be easier to collapse to a more compact size.
Any thoughts on the best way to get a compliant Glock SBR? Anyone else working on one?
