Midwest Industries AK Picatinny Stock Adapter - Converts Yugo M70 Pattern Fixed Stock Trunnion to Rear Picatinny Rail Mount - Matte Black - MI-AK-PEPA-M70
Product Description
Upgrading a classic Zastava, Century Arms, or military surplus Yugo M70 pattern AK rifle for modern ergonomic modularity reveals an immediate structural and compliance bottleneck: the restrictive, proprietary Yugoslavian fixed-stock trunnion. Unlike standard Romanian or Russian stamped receivers that use traditional dual-tang stock channels, Yugoslavian M70, M72, and M90 rifles utilize a unique single-bolt rear trunnion layout. This geometric limit historically forced marksmen to choose between blocky wooden furniture or heavy, complex adapters just to run modern stocks. The **Midwest Industries® AK Picatinny Stock Adapter (MI-AK-PEPA-M70)** completely eliminates these platform boundaries. It converts your native Yugo rear trunnion interface into a rock-solid, multi-slot **vertical 1913 Picatinny rail interface**, instantly opening your rifle rack to an elite ecosystem of folding stocks and stabilizing braces.
Precision-machined in the United States from a solid block of premium, domestic **6061-T6 structural aircraft-grade aluminum billet**, this high-performance stock adapter provides exceptional cross-axis stiffness and unyielding structural core longevity under heavy automatic or rapid-fire recoil forces. The unibody block is treated with a uniform, non-reflective **Mil-Spec Type III hardcoat anodized black jacket** that actively repels trail moisture, carbon fouling, and abrasive field scratching on your workbench. It mounts completely flush inside the rear receiver walls, utilizing a high-tensile steel mounting bolt to anchor firmly into the Yugo trunnion socket. This creates a solid-state, wiggle-free junction that will never wobble or walk out of alignment during long training blocks.
In high-stakes competitive dynamic fields, tactical training courses, or classic rifle transformation loops, the clean architecture of the **MI-AK-PEPA-M70** adapter optimizes your rifle's rear-end configuration. The rear face features a standardized vertical Picatinny rail section that accepts popular side-folding stock mechanisms, modular aluminum buffer tube adapters, and modern minimalist stocks. It is engineered with an integrated **rotation-limited QD (Quick Detach) sling swivel socket** machined directly into the lower base, giving armorers a slick, ambidextrous sling mounting point without requiring wide add-on receiver endplates. This original equipment manufacturer (OEM) grade hardware upgrade drops directly into your configuration to bring pure tactical versatility straight to your Kalashnikov layout.
*Armorer Bench Notes & Technical Field Assembly Guidance: The Midwest Industries MI-AK-PEPA-M70 adapter features an exact, tight-tolerance drop-in design engineered explicitly for **stamped receiver AK-pattern rifles utilizing Yugoslavian/Serbian M70-style fixed stock trunnions** (including the Zastava PAP M70, O-PAP, N-PAP, ZPAP M70, M72, and M90 series). CRITICAL RECEIVER COMPATIBILITY NOTE: This hardware is designed strictly for Yugo fixed-stock trunnion channels; it will physically fail to mount onto standard AKM/74 receivers, underfolder variants, milled receivers, or Yugo M92/M85 pistols that lack a stock bolt socket. **Workbench Assembly Sequence:** First, ensure your host rifle is fully unloaded, cleared, and field-stripped. Remove your factory wooden or polymer stock by backing out the long stock bolt from inside the receiver shell. Clean any factory thread sealant out of the internal trunnion threads using a wire brush. Slide the Midwest Industries adapter block flush into the rear receiver opening. Insert the included high-tensile mounting bolt through the internal alignment track and thread it into the trunnion socket. **Torque Specifications:** Tighten the mounting screw firmly to exactly **40–45 in-lbs** using a drop of medium-strength removable blue threadlocker. **Pro-Tip:** Let the threadlocker cure fully for 24 hours on your bench before clamping on a heavy side-folding stock and taking the platform out into aggressive firing splits.*
Key Features
- Yugo M70 Rail Transformation: Seamlessly converts proprietary Yugoslavian fixed-stock single-bolt trunnions into a modern vertical 1913 Picatinny rail interface.
- Monolithic 6061-T6 Aluminum Build: CNC-machined from a solid block of premium structural aluminum billet to eliminate warping, splitting, or loosening under heavy 7.62x39mm or 5.56 NATO recoil waves.
- Integrated Anti-Rotation QD Socket: Features a low-profile, rotation-limited Quick Detach sling socket machined directly into the base for clean, ambidextrous sling tracking.
- Mil-Spec Hardcoat Anodized Shield: Treated with a professional Type III hardcoat matte black finish that completely resists trail scratches, sweat exposure, and aggressive carbon solvents.
- Solid-State Anti-Wobble Junction: Outfitted with a heavy-duty internal mounting screw layout that locks flush inside the receiver walls, freezing stock play or rattle lines completely.
- American Armorer Manufacturing: Fully designed, engineered, and built in the USA to commercial and tactical duty-grade standards, ensuring absolute component tracking integrity.
Product Specifications
- Brand: Midwest Industries®
- Model Line: AK-Series High-Performance Stock and Accessory Adapters
- MPN/SKU: MI-AK-PEPA-M70 (Also tracked as MIAKPEPAM70)
- UPC Code Profile: 812102034322
- Firearm Interface Focus: Stamped Yugoslavian / Serbian Fixed Stock AK Trunnions (M70 / M72 / M90 Patterns)
- Rear Mounting Footprint: Standard Vertical 1913 Picatinny Rail (Multi-Slot Configuration)
- Sling Attachment Geometry: 1x Machined Integral Rotation-Limited QD Sling Swivel Socket
- Chassis Base Material: 6061-T6 CNC-Machined Aircraft Structural Aluminum Billet
- Exterior Finish Shield: Mil-Spec Type III Hardcoat Matte Black Anodization
- Hardware Inclusions: High-Tensile Steel Internal Trunnion Mounting Bolt and Washers Set
- Product Type Category: Long Gun Structural Small Parts / Stock Mounting Adapters
- Net Component Mass: ~2.40 Ounces (Ultra-Lightweight Structural Upgrade Block)
- Country of Manufacture: United States of America
