5.56 Sig Rattler Converted to .22LR 

Using .22 for defense will get you killed

The 300 is not pinned or welded

@@InferiorRifles ah thank you

The muzzle device is part of the gas system on the 5.56 version, hence why.

Compared to a 5.56, it’s a much slower moving projectile with about the same diameter. So if anything, it will wear your rifling slower than normal. The barrel will likely need more frequent cleaning, however.

@@InferiorRifles my thought as well. If anything I'd be worried about lead build up in the gas block/piston but meh.

@@hansjurgen Illumined arms recommends shooting 10 rounds of 556 through the system after using the 22 conversion to clear out any debris and buildup

I wish you luck and hope you don’t get hit with the blanket disapproval that many form 1 cans have been hit with in the past few months

Join any Form 1 discussion group on Reddit or Facebook, people are still getting approvals for Form 1 cans.

The 5.5’’ barrel on the Rattler will likely cause damage to most (if not all) suppressors due to the pressures generated at the muzzle.

@InferiorRifles I wonder tho theres more to it than that. All they had to do really was add a disclaimer to not use cans and they wouldn't be responsible really. I think it's a mix of that tho, plus by adding a can you effectively lengthen the barrels length but still have the dwell time of a super tiny barrel. It's made so all that extra pressure just vents out the front before the bolt unlocks and opens. Adding a can will now make it a hazard possibly for out of batteries I think. That... would deffo be a major reason why to idiot proof it. Then combine the two reasons and yeah they tried to make it super safe. I wonder if the military ones are threaded solely for blank fire adapter use? Hence why they keep them for training only. If they allowed live ammo in them around cans it may go kerboom. I have wondered if maybe using a bulletproof tough can that don't have a minimal barrel length that's rated for even belt fed use like a Rugged Razor, but in 30 cal would be a sort of a workaround the dwell time issue? Seems like it would reduce the boom yet still not seal it so much as to create a spike of pressure by using a 30 size bore all the way thru? Just a thought I've had while seeing these discussed. Anyways, just thought I'd add that little nugget that has crossed my mind. I haven't seen it mentioned elsewhere. But yeah maybe something to discuss with your subscribers when the 556 is concerned. I'd like to hear your thoughts on it too. Thanks bud good videos!

Not in an MCX

@@InferiorRifles knew it wouldn't with factory BCG but wasn't sure if the geometry was similar to a standard handle to where it might fit

You have to convince them that you're building it from scratch and not using a parts kit or any pre-fabricated parts.

I'm aware that's how it usually is but they've been out right denying all of them like I said I don't know if it's going on anymore

@@mehtevas2653 join any Form 1 discussion group on Facebook or Reddit, people are still getting approvals.

Thank you for the info

Correct; the BetterMag adapter is necessary for proper function with M&P22 magazines. It should work in an MCX without issue

I can assure you that much more expensive .22LR firearms exist, and most of those can’t swap back to firing 5.56 by switching BCG’s

I would frame it differently. A 3k backpack rifle that can shoot 3 different calibers (22LR, 556, 300 BLK) that are fairly fast’ish to switch over (barrel/BCG) and easy to also transport versus a rifle and 2 different uppers like a AR15 would need.

@@chriscurtis83 I would frame it differently. Two silly calibers in that platform. For $3K. I own a 300BO Rattler.

@@beck4218 I have a 300BLK Rattler too but also have the 556 barrel and the 22LR kit. It’s like 8 cents a round to shoot 22LR but way more for 300BLK. So thats why I did it. I can stock the more expensive stuff and use it sparingly but still stockpile it. I don’t think any of these options are silly. It’s silly not to have options because at the end of the day I still have a 300BLK rattler. Also I spent about 2k on my 300BLK rattler and with the extra barrel and threading with the 22LR kit maybe 2800 total I’ve put into my setup.

@@chriscurtis83 I deleted my last. lol the idea is growing on me. Why not have a dedicated 22LR platform with thew same size, weight, dimensions for training? I own a M249S (with 300 rds thru it over 3 years) and just bot the Para model so who am I to talk. I won't even shoot it.