Posted 20 March (edited) See pictures this is stamped HK 12/60. The bolt is stamped DH and IB. Edited 27 March by jhartmac price adjusted. Silver Spring, Maryland, United States Share this post Link to post Share on other sites
Posted 26 March Could you post a picture of the bottom of the carrier and also of the backside please. Share this post Link to post Share on other sites
Posted 27 March This is a HK91/HK11 bolt and carrier, it will not work on a 21. it doe's not have the grooves to move the sprockets on a 21. It is a FA carrier. 1 person likes this Share this post Link to post Share on other sites
Posted 27 March Ditto it's a 91/G3 Bolt Carrier. You may wish to separate the bolt head and take pictures of the markings located on the upper left side. This will assist you in getting the top dollar for your parts. The carrier should also have marking located in the recess of the top tube. 1 person likes this Share this post Link to post Share on other sites
