>>64172640
Based Real NATO builder.

>>64175668
>>64181491
I'm a bit sad I almost missed this. Nearly two weeks ago, how does the Wrist Breaker go?

>>64232772
>5.7x28 M1 Carbine
You COULD do the easier thing here and build the carbine for 5.7mm MMJ (.22 Spitfire). It should fit in the regular mags without a problem and give you hell of a lot more velocity.