Project: Li'l Wolf Pup

[MistWolf]

Thompson Center took the BATF to court over the same issue. BATF claimed T/C receivers had to be registered as SBRs because it was simple to add a stock. As a result, the BATF has determined that-
-A receiver that is originally assembled and sold as a complete rifle is forever a rifle
-A receiver that is not sold as a complete firearm, is an "OTHER" and may be configured as a pistol or a rifle whether it's fitted with a rifle stock or not. As a receiver may be configured as a pistol, the purchaser must be 21 and can only take possession of it in their state of residence
-A receiver that is first configured as a rifle is forever a rifle; that is the lower receiver, complete with rifle stock, is mated to a complete upper
-A receiver that is first configured as a pistol, is a pistol
-A pistol may be re-configured as a rifle. A pistol that has been re-configured as a rifle may be returned to a pistol configuration

Note that the BATF has determined that a receiver, even fitted with a rifle stock, cannot be not sold as a rifle as it may still be legally configured as a pistol.

Other pistols are configured as to readily accept rifle stocks, such as the Browning Hi Power & Broomhandle Mauser, yet they are not required to be registered as SBRs until the stock is actually installed

[Lincoln7]

However, possessing a rifle buttstock that could readily be installed on your pistol could constitute possession of a short-barrel rifle.

This is the statement that gave me concern. Does the installation of the Sig Brace make it not readily installable? Or are you not allowed to possess a 'loose' rifle buttstock?

[MistWolf]

This is the statement that gave me concern. Does the installation of the Sig Brace make it not readily installable? Or are you not allowed to possess a 'loose' rifle buttstock?

To install a SB15 on a rifle RE, it has to be wrapped (I used gaffer's tape) to enlarge it's OD so the arm brace will fit. To install a rifle stock, the SB15 and the tape would have to be removed. That means the stock cannot be readily installed. Do your research with due diligence, use common sense and don't go inventing trouble for yourself. Let's get this thread back on track- discussing jut what a great shorty AR the Li'l Wolf Pup is and how it will further evolve to become the epitome of awesome

[Lincoln7]

Sorry about the tangent, Mist.

I had a 10.5" pistol and am running an H3 buffer in it very reliably (now a SBR). I just picked up a Wolff extra power buffer spring to slow it down some more (I run it suppressed often). I recommend you try the H3 in yours, too.

[MistWolf]

No worries, mate.

The H3 buffer is too short to work in a rifle RE and the weight of rifle buffer is close to that of the H3. I figured since I wanted a longer RE to better support the SB15 and use a heavier buffer to soften recoil, I'd go rifle and get both. Felt recoil isn't bad with the current setup, which includes a Tubbs 308 action spring but I wanna try an adjustable gas block and an LMT enhanced carrier to see if they'll help move the Li'l Pup closer to awesome. The adjustable gas block will also come in handy when I get a suppressor.

Let us know how that Wolff spring works out

[Lincoln7]

The H3 buffer is too short to work in a rifle RE

Let us know how that Wolff spring works out

Haha, got me Yeah, that rifle RE should make things pretty nice. Is it safe to assume the Tubbs 308 spring is heavier than stock?

I'll let ya know on the Wolff spring!

[MistWolf]

...Is it safe to assume the Tubbs 308 spring is heavier than stock?...

That, I don't know. It was in the spare part bin of a friend of mine. He let me take it to try it out

[hjmpanzr]

Having seen the gas port in question, you'd really benefit from an adjustable gas block. I just put one on an SBR build and pulled the A5 off and now it's running with just a regular H buffer. Made a big difference, but only about 100 rounds thru it so far.

[RMiller]

Mistwolf,

For you, using the arm brace, is the juice worth the squeeze? Is the brace really that useable? Or is it a compromise? Is a 10.5" barrel that more useable vs a 16"?

[MistWolf]

Yes, the juice is worth the squeeze. It's firm enough to be used against the shoulder without squirming or collapsing, especially when the RE runs the full length of the brace. The Wolf Pup isn't any less controllable than it would be if equipped with a rifle stock. There are compromises. It lacks easy adjustment of LOP and it's wider, heavier and more expensive than most adjustable stocks. To answer your question directly- yes, it really is that usable.

The 10.5 inch barrel trades velocity for handiness to good effect, while retaining the terminal performance of a rifle within practical self defense ranges. The 10.5 barrel will also keep over all length shorter when using a suppressor