6.5 Grendel barrel Length?????

[depletedyourcranium]

When applying the BATFE letter regarding the TC Contender to AR15 stripped lowers, those lowers purchased as "pistols" or "firearms" can be configured as pistols, rifles, and converted between the two. However, if you have an AR15 that you bought as a complete rifle, the lower receiver on that firearm is a rifle and cannot be legally converted to a pistol setup without violating the NFA. You can build out a stripped lower into a rifle, then later convert it to a pistol, without violating the NFA per the TC Contender letter here: https://www.atf.gov/firearms/docs/ruling...s/download

It should be noted that this is always subject to change and future rulings by the BATFE. Also the TC Contender letter does not specifically mention AR15 lowers, and as far as I know the BATFE has never rendered an opinion specifically on AR15 lowers. Nonetheless, the TC Contender letter can at least be minimum guidelines on how to consider the legalities of converting stripped powers into rifles and pistols from parts.