Q: How to use AR stocks with HK21/23E / MM21/23E ?
Is there an off the shelf solution to use mil-spec AR stocks with the 21E/23e family of guns?
Seems like you would need a 21e/23e backplate assembly that had been modified to accept a mil-spec buffer tube with an HK 21e/23e buffer assembly?
This thread has pics of a Magpul UBR stock on a 23e I'd like to duplicate: The Raven - Page 2
Hmmm, I thought i might be off-the-shelf
I'll call TSC and see if the sell the adapter
he prob won't as he only has a few made at a time and you have to do some modding to the stock. His newer version is better than the old one. Just buy a UBR and send it to him. I prefer the gen 1 as they are aluminium vs the newer gen 2s with plastic locking tabs
But they are the bomb. I have two of them and will be adding another to my 21a1.
dont use the AR stock adapter posted above on a 21/23e. The TSC UBR mod has a great cheakweld, a adapter backplate does not and your face will get beat up on the stock over the buffer tube.