Combloc
Stop Negassing me!!!!!
I can't say about the upper without seeing details but the lower is for sure a late pre-ban because it clearly has a receiver block.
What happened to using a condom? That was the way in my days..
Levang linear comp maybe? A quick search says this may have been sold through DPMS at some point.
https://www.eagleweldingmn.com/store/Levang-Linear-Compensator-p135437844
https://www.midwayusa.com/product/100333569
https://www.wolverinesupplies.com/productdetail/dpmllcgs01_ar15-levang-linear-compensator
Levang linear comp maybe? A quick search says this may have been sold through DPMS at some point.
https://www.eagleweldingmn.com/store/Levang-Linear-Compensator-p135437844
https://www.midwayusa.com/product/100333569
https://www.wolverinesupplies.com/productdetail/dpmllcgs01_ar15-levang-linear-compensator