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Dirty Bird DB9 9mm / Pistol Caliber Receiver Set vs Grey Ghost Precision MKII Billet AR-15 Receiver SetReceiver Sets
Put receiver sets head to head to compare size, weight, and more.
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Featured Deal
$299.95
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Featured Deal
$399.00
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| Receiver Sets | Dirty Bird DB9 9mm / Pistol Caliber Receiver Set | Grey Ghost Precision MKII Billet AR-15 Receiver Set |
|---|---|---|
| Summary | ||
| Rating |
Not Rated
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Not Rated
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| Rank | ||
| Weight | 0.0000 oz | 31.2 oz |
| Color | Black, FDE, Midnight Bronze, OD Green | |
| Details | ||
| Brand | Dirty Bird Industries | Grey Ghost Precision |
| Prices | ||
| MSRP | $299.95 | $399.00 |
| Used Price | $209.97 | $279.30 |
| Sale Price | $269.96 | $359.10 |
Receiver Sets Descriptions
Dirty Bird DB9 9mm / Pistol Caliber Receiver Set
This upper & lower receiver set is manufactured to work perfectly together. Zero shortcuts were taken. You can expect clean machining, excellent fitment and one of the most reliable last round bolt hold open systems on the market. Read more below: Dirty Bird DB9 9mm Billet Lower Receiver The DB9 Billet Lower Receiver is an ideal choice for starting your pistol caliber (9mm, 40 S&W, .357 Sig) AR build. Precision machined from a solid block of 7075-T6 billet aluminum and finished with hard-coat black anodizing per Mil 8625 Type 3 Class 2 specifications, you can be sure that this unit is as tough as they come. This lower receiver accepts any Glock style small frame pistol caliber magazines in 9mm, .40 S&W, .357 SIG, etc. and the mag well features a beveled feed lip for quick and easy mag swaps. Extensive testing and attention to detail also ensure that your Glock style magazines will drop free when released. The proprietary magazine catch and ejector is included and pre-installed from the factory. Other features include: Threaded takedown pin spring and detent hole for easy installation. Set screw is included. Note: To prevent excess pressure on the rear takedown pin and detent, you can shorten the detent spring by the same length of the set screw using some wire cutters prior to installation. Threaded upper tension screw to adjust any “”slop”” out of vertical fit between the upper and lower. Ambidextrous finger rests above and below the mag release. Threaded bolt catch pin included for easy bolt catch installation. Manufactured by New Frontier Armory right here in the USA. Lifetime Limited Warranty Important information: Magazine Compatibility This lower will drop-free factory Glock small frame pistol magazines. It has also been thoroughly tested with Magpul GL17 9mm pistol magazines to fit and drop-free. Promo, KCI, Kahn and other types of magazines will also work but due to varying thicknesses relative to factory Glock mag dimensions, slight modification may be required. Last Round Bolt Hold-Open After evaluating many different design concepts from other manufacturers and finding fault in nearly all of them, we’ve designed this lower to use any standard mil-spec or similar bolt catch. Our last round bolt hold open technology instead resides in our matching pistol caliber upper receivers. These billet upper receivers use a PATENT PENDING design which has been proven in numerous field tests to provide the most reliable last round bolt hold open of any that we’ve tested. Bolt Carrier Group (BCG) Requirements You’ll need a BCG which is compatible with Glock style magazines. Some BCGs in the market are compatible with both Colt and Glock style magazines but some others are specific. The difference is Glock magazine compatible BCGs have the relief cuts necessary to clear the magazines. Lower Parts Kit Compatibility Any mil-spec or better LPK will work but you won’t need the mag catch assembly, bolt catch roll pin or the trigger guard as those are all included with this lower. Buffer Recommendations You’ll want to use a 9mm (extended) buffer which is longer and heavier than a standard carbine buffer. Standard carbine buffers will work but it’s a good idea to use a spacer to limit the rearward travel. This is simply because a 9mm BCG is shorter than a standard BCG which means there is more travel and gives the BCG more time to build speed as it returns home and this extra velocity can cause excess stress on the bolt catch. 9mm extended buffers are common and well worth the investment. Before firing your new build we suggest you adjust the ejector. You can do this quickly and easily by following these steps: Back-off the two hex-head screws holding the ejector just enough so the ejector has a semi-tight “”friction fit””. Ensure the ejector is seated all the way to the rear and all the way down in it’s pocket. Close the upper onto the lower with the bolt all the way forward. SLOWLY cycle the bolt in and out about 1/4 of the way back a few times. Allow the bolt to close all the way and tighten up the ejector screws. No need to over-torque as this could cause the ejector to shift position, we’ll be adding blue (non-permanent) locktite in the next step. OPTIONAL: At this point you can use some dummy rounds to check for proper ejection. Remove one ejector screw at a time (ensuring the ejector does not move) and add a dab of blue locktite to the threads and tighten them back down. New Frontier Armory Pistol Caliber Billet AR-9/45 Slick Side Upper with LRBHO PATENT PENDING Caliber: Multi (will accept any barrels, bolts and caliber designed for the AR-9/45 style platform) Weight: 8.96 oz Measurements: 7.662 x 1.375 x 2.314 Other Specifications and Features of the Billet AR-9/45 Slick Side Upper with LRBHO: Machined from 7075 T6 aircraft grade billet aluminum Matte black hard-coat anodized per Mil 8625 Type 3 Class 2 Compatible with all standard AR-15 / AR-9 components and most aftermarket parts Manufactured to MILSPEC on state of the art CNC equipment for consistent quality parts and exacting tolerances Save money by building your own AR-9 rifle or pistol from the ground up exactly the way you want it configured Designed to match lines with New Frontier Armory C-9 & C-45 Billet Lower Contains integrated Last Round Bolt Hold Open (LRBHO) technology (PATENT PENDING) that reliably holds the bolt open when magazine is empty LRBHO feature is designed for lowers that accept Glock style magazines **NOTE This upper is not machined for a gas tube as it is intended for blowback gas systems only Once assembled the small hook end of the wire form in the upper should be pushed up by the follower of an empty Glock magazine which will engage the bolt catch on the last round fired to hold the bolt in the locked position. If it does not engage, or engages before the last round is fired you can make VERY SMALL adjustments by SLIGHTLY bending the hook end down to lock faster or up to lock slower. They are set and function checked during assembly with brand new Glock magazines and our standard bolt catches. Because of varying magazine specs, magazine specs changing over the life of the product, different thicknesses of the pad on the bolt catch and other variables, this adjustment may be necessary with your specific parts. **NOTE: Some rail systems that use anti-rotation tabs may need slight modification to fit this upper. It is designed for flush mounting rails and standard hand guards. The New Frontier Armory Pistol Caliber Billet AR-9/45 Slick Side Upper with LRBHO is proudly MADE IN THE USA by hard working American men and women.
Grey Ghost Precision MKII Billet AR-15 Receiver Set
At the end of the day, there’s nothing wrong with MIL-SPEC. It gets the job done, after all. Still, why would you settle for the bare minimum acceptable standard when you could elevate your build with something better? The MKII GGP-S series receiver set is just what you’re looking for. Precision machined to exacting tolerances with a host of upgrades over standard receivers, the GGP MKII Billet AR-15 receiver set is the ideal way to start your build. Features: Precision machined to within +/- 0.001″ tolerances Cut from high strength 7075-T6 aluminum billet Hardcoat anodized black finish with 60 Rockwell surface hardness Integrated ambidextrous bolt release Flared magazine well for faster reloads Pictographic Fire and Safe indicators Multi-caliber lower marking Integral trigger guard Threaded takedown pin hole with set screw Threaded bolt catch pin Nylon-tipped receiver tension screw A proper MIL-SPEC lower receiver’s dimensions can vary over .005″ or more from one receiver to the next. This is fine for a military rifle, but these tolerances can stack up, impacting parts compatibility, fit, and function, especially when using aftermarket components. By comparison, the MKII Billet AR-15 receiver set is machined to exceptionally tight +/- 0.001″ tolerances, allowing for incredible consistency. To further increase accuracy this lower features a nylon tipped tension screw, ensuring your upper and lower fit together without rattle. For enhanced convenience, the bolt catch and takedown pin are threaded for fast and easy installation. Even better, the lower is machined for an ambidextrous bolt catch release. With an extensive military and manufacturing background, and an impressive network of industry and shooting experts, Grey Ghost Precision has pushed on to create not just exceptional firearms and accessories, but make sure those products are accessible to shooters everywhere. They also fully stand behind their products, with a limited lifetime guarantee!
