MIDWEST LOWER RECEIVER BLOCK

Midwest Industries is known for bringing the highest quality manufacturing processes and accessories to the firearms community. With their long history, they are pleased to bring their tricks and knowhow of building quality firearms to the end user’s workbench with their high strength polymer Mag Block. Utilizing either the .223 Remington/5.56 NATO or the .308 Winchester/7.62 NATO AR receiver sets, this new mag block makes some of the most tedious tasks in building an AR-style firearm fast and simple. With features including a gas block roll pin installation section, a trigger guard installation section, a fire control pin assembly, and many other applications outside of its classic use, this lower receiver block will be the key to building your next firearm. Made in the U.S.A.

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Sale!

MIDWEST LOWER RECEIVER BLOCK

Original price was: $41.95.Current price is: $36.95.

SKU RSR|MWMI-LRB Category Online or In-store: Brand:

Availability: 21 in stock

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🚚 Shipping Information

In-store or Non-restricted Items
✅ Ships directly from our us or the distributor
✅ Arrives in 3–7 business days

Restricted Items “Ships to us first”
📦 Some firearms and optics must ship to us first due to manufacturer restrictions 
⚡ Minimal delay — we ship it out as soon as we receive it
📍 Delivered to you oryour chosen local FFL
📅 Total time: 5–10 business days

Quick FAQ – Blackbox Ballistics

Prices & Sales – We price with a standard percent over cost unless MAP (Minimum Advertised Pricing) restrictions apply. We often run sales, and if you see a better price, give us a shot at meeting or beating it.

Inventory – We’re not a full brick-and-mortar store, so most items ship from distributors. Sometimes we have products in stock — especially popular firearms, ammo and optics.

Special Orders – Don’t see it? We can probably get it. Just ask.

Returns – See our Return Policy for details. Firearms, ammo, and special orders can’t be returned once transferred or shipped.

Transfers – Yes, we handle transfers from other sellers. By appointment for privacy.

Payments – We accept cash, credit cards, and ACH transfers. Cash/ACH may qualify for a discount.

FULL FAQs

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