HK MP5 Bolt Head - 9mm

I have had two MP5K clones that from the factory had trouble with extraction of rounds. Extraction was weak and even in cases where it would work most bolts only worked for 1200 rounds or so. I replaced both bolts with an Ebolt by RCM and it tears rounds out of these weapons so hard that it hit the wall next to me at the indoor range and landed on my head. It throws rounds 10 feet away from my MP5K clones. I replaced everything I could with HK parts but this is the one thing an HK bolt and extractor can’t beat! My weapons went from semi-reliable to I would trust my life to these MP5Ks. Still buy HK mags and other parts because you can’t beat the quality but as far as bolts go you will not find better than the RCM E-bolt especially if you have a post sample, transferable SMG, or an FRT that increases the rate of fire to cyclic rate.

Had so many fail to eject issues with my AP and I had tried everything. Springs and all that. Genuine HK replacements for basically everything and never had anything work. Dropped this in, gap was perfect in spec. Ran hundreds of rounds with no issues right out the box. Fixed my AP5K. Genuinely so happy about it.