HKParts Posted April 6, 2018 Report Share Posted April 6, 2018 HK UMP 45 - Semi Auto Bolt Carrier Complete with Ejector Includes Extractor Includes Firing pin Retaining Pin Includes Ejector Marked .45 Auto just like the OEM carrier The semi auto bolt group is required for HK USC to HK UMP caliber conversions. You can get it here: https://www.hkparts.net/shop/pc/Semi...P-12p18588.htm Or by calling us at 801-987-3494 Quote Link to comment Share on other sites More sharing options...
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