Unlike others, i received my parts on time and to the correct address. However my classsic arms branded bolt and bolt carrier in 6.4grendel lasted about 100rds before the extractor sheared off. Emailed classic firearms and they basically said that since i didnt buy the warenty there was nothing they could do... This was hilarious to me, there is basically no warrenty on their parts unless you buy tue extended one lol. Just stay away, not worth the few bucks you'll save. Buy off optics plannet, jobob or somethimg. Just not cheaper than dirt, they're price gouging aholes.