Worst parts kit i've ever seen do not buy the california approved kit, the magazine catch is garbage - CMMG, Inc Gunbuilder's Lower Parts Kit For AR-15 California Approved 55CA6D2

bought cmmg kits before, they were good. but the california kit is trash. i accidentally bought this one and had to make another order for a mag catch. set back my project back a week. dont make the same mistake i did. as long as you dont buy the cali kit you'll probably be fine. cmmg has another kit thats only 40 bucks and is higher quality.