The BA-AKNT adapter allows for easy installation of buffer tubes and receiver extensions on AK47/74 pistols. The ideal solution for SBA3/SBA4 equipped AK's, the BA-AKNT accepts flat and sloped AK receivers. Adapter machined to accept flat and sloped AK receivers. Simple and secure installation (castle nut recommended). Dimensions: 3.5 x 1.75 x 1.75.