I have here a like new dedicated 22LR upper for your AR15 milspec lower. This upper was made by Plinker Arms, comes in the box with all paperwork, 3 mags (the original 25 round mag, another NIB 25 round mag and a 10 round mag). The upper is all aluminum/steel - no plastic here. It has a T marked quad rail, flip up front and rear backup sights, and bolt. It operates via blowback. A recoil buffer and spring is not required for operation of this upper - but you don't need to remove them from your lower for it to operate either.
It's ready to snap on your lower and let you enjoy some low cost plinking/training. This upper will work with the bolt release on your lower and the bolt will stay open after the last shot in the magazine. My price is half of the original MSRP but includes the additional flip up sights and magazines. The price is $300 shipped, $275 local FTF (I'm in Plano, TX). I do have it cross listed. It will sell to the first person that says they will take it. I can be reached via PM or email - email@example.com
for a non FTF sell I will take either a USPS money order or will do discrete PayPal.The upper is SPF to TRG. Thanks, Earl