u/BleepinGibberish

I am looking for an APC10 buffer (for an APC10 with Glock lower). I believe the part number I am looking for is BT-36320, but I am having trouble finding one at the moment (surprise, surprise)…

However, I can find adapter assemblies advertised as being compatible with APC9/APC40/APC45s, but also listed as not being compatible with APC10 G models. Do the APC9/APC40/APC45 adapters use the same as the BT-36320 APC10 buffer?

Specifically: is the buffer used in either of these two adapters compatible with an APC10?

BT-361742
BT-20522

Maybe a dumb question, but figure I should ask and make sure before I am committed, and since everyone is an expert after being at the HRB meeting yesterday…

Since (my understanding is that) MD treats SBRs like pistols, if you SBR a rifle, does it need to be on the roster if it starts its life as a commercially-available complete rifle? If so, how would that that process work?

(To explain: I am considering starting a two stamp 8.6BLK Sig Cross build.)

Due to the recent brace rule change (also: I find the Form 4999 intentionally confusing), I am trying to determine if it’s time for me to Form 1 SBR an APC10 pistol.

In order to be state compliant, I will need the SBR to be a minimum of 29in OAL without a suppressor (unless it was pinned and welded, which would totally defeat the purpose of the tri-lug QD, so I would like to avoid going that route unless there’s no other way) and with whatever-you-want-to-call-the-thing-that-may-touch-a-shoulder fully extended. Relevant: I would much prefer a tele setup rather than a folder.

Should I keep the APC10 a pistol? If so: what are your thoughts on the B&T tele brace (assuming I can find one somewhere collecting dust on a shelf)?

Or should I convert it? If so, where should I be looking for a tele stock and other parts that would get me to a 29in+ OAL?