The HK21 is a German 7.62 mm general-purpose machine gun, developed in 1961 by small arms manufacturer Heckler & Koch and based on the G3 battle rifle. The weapon is in use with the …

The HK 21K is a TSC conversion of the famous HK 21. We have altered the 21 to the shortest length possible and retained all of our 21E upgrades. These upgrades have dramatically …

The Heckler & Koch HK21 is a select-fire, roller-delayed blowback operated select-fire rifle that can be fired in semi- and full-auto and even in 3-round bursts if your battalion commander …

The HK21K is an American, custom-made conversion of the HK21, produced by TSC Machine. The barrel length has been shortened by an extreme amount. The stock of which is that of an …

Imagine a Belt Fed that can be configured as a Pistol with a 9" barrel. Then in 5 minutes be taking out targets at 1000 yards with deadly accuracy. All the Upgrades that we have pioneered for …

HK21K-UBF (Universal Belt Fed) 9" to 22" Barrel This is the one that everybody wants! Imagine a Belt Fed that can be configured as a Pistol with a 9" barrel. Then in 5 minutes be taking out …

TSC can also convert your standard 21E or 23E to our K model. This shortens the shroud and barrel. This makes the ultimate HK belt-fed. TSC Machine services, repairs, and upgrades …

Mar 27, 2025 · HK21K FMP (TSC host build) SBR. Semi trigger group installed. Extra barrel. Very nice on a form 4 for $19000. Group Industries (Vector Arms Mini Uzi) HR4332. Like new on a …

Fleming/Heckler & Koch HK21K Belt Fed Sear/Host Combo, Class III/NFA -A) Fleming Firearms Auto Sear, Class III/NFA Fully Transferable Machine GunSear is individually marked, installed …

May 7, 2009 · HKPRO is a forum community dedicated to Heckler and Koch enthusiasts. Come join the discussion about HK pistols and rifles, optics, hunting, gunsmithing, styles, reviews, …