Eemann Tech Recoil Springs Calibration Pack | 1911/2011

Description

Calibration pack of progressive recoil springs engineered for 5″ 1911/2011 pistols built to IPSC CLASSIC (MAJOR) specifications. The kit spans 15–18 lbs (one spring of each: 15, 16, 17, 18 lb) so you can precisely tune slide velocity, felt recoil and reliable feeding for different loads or competition setups.

Progressive-wound construction gives a two-phase spring curve — an initial, lighter compression followed by a stiffer secondary stage — which smooths the recoil impulse and helps control slide motion through the entire cycle. Each spring is finished in a polymer heat-treated colour coat for easy identification and long service life.

Features:

• Progressive wound design (two-phase action) for smoother recoil control and reduced impulse.
• Four spring strengths included: 15 lb, 16 lb, 17 lb and 18 lb — covers the typical CLASSIC MAJOR tuning range.
• Color-coded, polymer heat-treated finish keeps springs identifiable and prevents internal finish wear.
• Typically drop-in fit for most 5″ 1911/2011 platforms — no fitting required in most cases.
• Made for competition tuning: lets you match spring rate to ammo, compensators, and other mods.
• Recommended installation and initial testing by a certified gunsmith.

Compatibility:

• 1911 / 2011 pistols (5″ barrel length) configured for IPSC CLASSIC (MAJOR) use.
• May also fit many 5″ 1911/2011 clones and custom builds — confirm dimensions with your gunsmith before fitting.

Package Contents:

• 1 × ET-111335 — 15 lbs spring
• 1 × ET-111336 — 16 lbs spring
• 1 × ET-111337 — 17 lbs spring
• 1 × ET-111338 — 18 lbs spring

Installation & Notes:

• No fitting is required in most factory pistols; some custom or pre-modified guns may need gunsmith assistance.
• Professional installation and function testing with the ammunition you intend to use is strongly recommended.
• Color coding remains visible through service life; springs are coated to avoid staining or marring internal parts.