An Idea From A Reader

    Annika, a reader of TFB, emailed me an idea for an AR-15 upper receiver and asked me if I could post it on the blog to see what y’all thought of it …

    I’ve got a pretty straightforward idea that I’m hoping for some feedback
    on. If you felt like making a post on this idea in order to get broader
    feedback that would be cool, otherwise I’d just appreciate your own take
    on it. If it seems like interest in the product would be high then this
    could also serve as a petition to the industry in general to create such a

    I want to suggest the creation of an inexpensive pistol-caliber AR upper
    receiver with a right-side magazine well for accepting Glock mags (for
    example). The ejector port could be positioned so as to eject spent cases
    down through the lower receiver’s magazine well, and a simple
    reciprocating charging handle could be positioned on the left side of the
    receiver for manipulation using the supporting hand while maintaining a
    standard grip, holding the firearm on target. Otherwise the arrangement
    could be flipped so as to somewhat replicate the layout of the Sten.

    This arrangement would have the obvious advantage of removing the lower
    receiver from consideration when switching between different caliber upper
    receivers. No dedicated lower receivers or annoying mag well blocks would
    be required. This would also be a largely ambidextrous set-up, with
    neutral downward ejection.

    I imagine this would be targeted specifically towards shooter with a Slide
    Fire Solutions SSAR-15 or other pump-fire stock wanting to shoot pistol
    caliber ammunition but not wanting to have to deal with some of the
    complication or expense you can currently expect with other compatible
    pistol caliber carbines. This would be an entirely self-contained and
    simple conversion unit.

    In keeping with the overall intent to produce an inexpensive product I
    imagine this receiver being constructed of glass reinforced Nylon (like
    KelTec’s Zytel) or possibly with stamped sheet metal. If the LMT patent
    could somehow be worked around it would be ideal for the handguard to
    simply be an extension of the receiver, instead of a separate piece. I
    imagine the receiver being manufactured with one top rail for optics and
    no included iron-sights. Potentially the receiver could feature a
    heavy-profile barrel of, say, 10″ with either the last 6″ milled out for
    lighter weight or with a 6″ FH or shroud/extension permanently attached,
    discouraging warping from heat generated by high-volume fire while
    maintaining a low enough weight for maneuverability and effective use of a
    bump-fire stock.

    I have no interest in copyrighting, patenting or otherwise legally
    claiming permanent ownership of this idea, since my primary interest would
    be to see the product go into production in a timely fashion.

    Included is a very rough sketch of how I imagine the final product could

    Steve Johnson

    I founded TFB in 2007 and over 10 years worked tirelessly, with the help of my team, to build it up into the largest gun blog online. I retired as Editor in Chief in 2017. During my decade at TFB I was fortunate to work with the most amazing talented writers and genuinely good people!