View cart “HK Sling UMP G36 SL8 USC Etc Factory New” has been added to your cart. Factory HK Bipod HK21 HK21E$39900 SKU: 21EBP-1 Categories: MP5 & 90 Series, Services - HK PSG-1, Services HK 91 93 G3 33 53 90 Tags: HK21, HK21E Product ID: 5996 Factory HK bipod for the HK21 and 21E belt-fed machineguns New old stock Product is out of stock Estimated Re-stock date: November 8, 2021 Notify me when this product is back. Please enter a valid email! Subscribe Description Additional information Description Factory HK bipod for the HK21 and 21E belt-fed machineguns New old stock Additional information Weight 21 oz Dimensions 11 × 3 × 2 in Related products Out of stock HK SG1 Cheek Rest Stock for Single Rear Pin Receivers MP5 33 53 93 $19900 Out of stock Black Polymer HK Vertical Grip 416 G36 UMP MP5 $3900 Out of stock Sale! HK MSG90 Factory Hard Case New Original From: $79900 Original price was: $79900.$69900Current price is: $69900. Sale! PSG1 Side Stiffening T-Rail Set $24900 Original price was: $24900.$19900Current price is: $19900.