Cybershooters

Sixshot6 · Joined: 17 Jul 2014 Posts: 399

I have bought a new FAB defence buttstock for my VZ58 which has an AR stock adapter on it, part of the Adapter includes a buffer tube, I was trying to replace the one on it for the FAB stock in question. It goes on part of the way but gets stuck at the end of the tube? Any idea what could be happening?

Sixshot6 · Joined: 17 Jul 2014 Posts: 399

I have noticed the dimensions at the bottom of both stocks is different, I believe I need the straight back tube.

cybershooters · Site Admin Joined: 17 Jun 2006 Posts: 4587

There are two different diameters for AR-15 collapsible buttstocks, the "commercial" diameter and the "military" diameter, the "commercial" buffer tube is slightly larger so mil-spec buttstocks won't fit on it.

I've seen various explanations as to why two different types exist, as I dimly recall from my own experience, someone back in the 1980s wanted to copy the Colt stock (maybe Olympic Arms, they've made non-standard parts for money reasons on various occasions) and it was cheaper at the time using a larger diameter tube, I assume because of the threading. Might have been for patent reasons as well.

The "commercial" tubes have a slanted end so you can tell them apart.
_________________
Steve.

Only three things are certain: death, taxes and stupid gun laws.

Sixshot6 · Joined: 17 Jul 2014 Posts: 399

I checked, its a commercial tube, I have ordered a milspec from midway uk, don't know when its coming but its coming. Its slanted. Its just a tube cover I needed as since the VZ58 is a gas piston it doesnt need the full buffer tube, just the cover. Its a UTG one I have coming.